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b=O4ECAOJANMtYeu4e1JUrjrHkdEn8xah1KNCMaTQCF8mA97jkbs+IMKnWFQ6GmR4SU FXQ7G6rtU6KoZ5kCqU+EUizgkZ6+GRQW/175FcRmjq2KQoOPxe1L3iv0+AUTM5WlIk GWkyBwYx0QCaxtFPlvPsiP811IxCrXIE4PQUj9iU= Date: Tue, 30 Jul 2024 14:15:08 -0700 From: Andrew Morton To: Danilo Krummrich Cc: urezki@gmail.com, hch@infradead.org, vbabka@suse.cz, mhocko@suse.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH 1/4] mm: kvrealloc: disable KASAN when switching to vmalloc Message-Id: <20240730141508.2da2194a2faacfabb6030c18@linux-foundation.org> In-Reply-To: <20240730185049.6244-2-dakr@kernel.org> References: <20240730185049.6244-1-dakr@kernel.org> <20240730185049.6244-2-dakr@kernel.org> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 8997A20005 X-Stat-Signature: ei1cz5azoje4f3gf7td36933czy4ouzh X-Rspamd-Server: rspam09 X-Rspam-User: X-HE-Tag: 1722374113-225709 X-HE-Meta: U2FsdGVkX18dddqdMHNKA8M05hmrqmOZMLTow2f7WpHziak9HZGhQX4ZKwtgzGLUSzuBHBU1T60Db6Lh2cej14quwtY5hbZDF8rhJeMD02VZornrgKKJgDF4SxjsFpZw95w88nKsu6B4285sEmK2GyszVProe6z+sL2kDEc5X7gVk3GtKoDYvEkIdas/1xvaIt45HLBosSDf33MA0DzPAafE6SrI8nzKpm/j0tZG6Qb8idI1Ru883Or5eqvU1f5QuWKpmUTCjpFOtQdwdq2In2adHNyEhAWuVg20WyZWV6Ocv/3aBf2kUugLncZiCfByhRIaj4f2AkJE4bYaCZlIk05YFdqGkc4cQ4ZJM3c4crRKQ9OJN3PF71+xLXBmvwLolFtIJWCoPuK7GoUKNcqsuZKjrK5pQykaepUV2s6yRVLUghZs+vkndS/KGLrdj4qT+G+X8ppr7VMTBNIcKhpmNcJBp/KuZKov1mxWrHxlO/KGN0gLCzOqjW3NV7fRArI3ce7g4LRe+1FesmMvVVepy1nh5Uav85OpqhYd3qRyEj84217vYfPU6i51+NUO3Wp3KBltVMnCqYQq79IBhd38MRz6s2GFIiellvCN7G59UklYXJ240+2GoJEKmc0VEfPxYgWzsGU0yz9iUMuQn/alQSw5Q70OYUabSOnCNJeiTTAGGrAxOEJ6zZXCwOb2fVK6v4EVQBMjtWyZOxeYWvBaxD7Ga8R8rZVGT+DNkuLKoAi0dobtUOg+sEOFdlGPSvij20aJdbCYTs+St09s0G0KWuVui/b629M+NCEWKOzGoP0Uz/2ReJRC/DbzUYB8ablYIjz3VCUaeO/kh94ZLYcdQNVF1pVOGIjdaxH0PLSu5q7RPopGFdcY1xcpyvEgxIAP48NmvUCPrihNG/Ezui3dqVCNJq2VB2IuCdgKyTTRCBPaO2FtPem5m/PVXOcZQ16JjIVSObVx+WoWNU9w6US xTZMpNfS vzom/cSA2aXhhamOLOCHvPlCxikM/NSoPMOYkqepXbTg2jAFfqdexmIqeF/6jak8fbcqc1F6tLwtU/KsuA3wDImnbSIqoxr14YqqM+U8TO0+G482gGbmKHZKtfhP6knujsFE4RG8uh3pHTn9H7gm0QlYmyCsVBNdjlIx7n40UJe27ELxjrz2hs/RZfhmn/8TupFWR3IeEu902G/e61JiFe+cdTV80LG23P7A1/YBBoyjgPjysnu/+DLf/TPRVcfrXmZTN/Og4kZbPeYgJG2JGhk+bkw== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000318, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, 30 Jul 2024 20:49:41 +0200 Danilo Krummrich wrote: > Disable KASAN accessibility checks when switching from a kmalloc buffer > to a vmalloc buffer. This text tells us "what", which was utterly evident from a cursory read of the code. Please tell us the "why". Completely. > Fixes: 923a26b4c679 ("mm: kvmalloc: align kvrealloc() with krealloc()") For those who are following along, this patch in mm-unstable so this patch will be squished into the above.